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Method for enhancing formation speed of anaerobic ammoxidation granular sludge by controlling reflux ratio

An anaerobic ammonia oxidation and granular sludge technology, applied in chemical instruments and methods, return water treatment, water treatment parameter control, etc. Problems such as poor mixing effect, to achieve the effect of easier separation of mud and water, resistance to changes in external environmental conditions, and prevention of sludge loss

Active Publication Date: 2016-08-31
江苏康玉环保科技有限公司
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Problems solved by technology

However, at a low surface rising velocity, due to the small gap between the granular sludge, the gas accumulated at the bottom of the sludge cannot be released in time, resulting in poor liquid-solid mixing effect, and the sludge bed in the UASB reactor is prone to floating or segmenting Phenomenon

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  • Method for enhancing formation speed of anaerobic ammoxidation granular sludge by controlling reflux ratio
  • Method for enhancing formation speed of anaerobic ammoxidation granular sludge by controlling reflux ratio
  • Method for enhancing formation speed of anaerobic ammoxidation granular sludge by controlling reflux ratio

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Embodiment 1

[0026] A method for controlling the reflux ratio to increase the formation rate of anaerobic ammonium oxidation granular sludge is carried out according to the following steps:

[0027] (1) The sludge reaction zone of the UASB reactor tank is set in the shape of an inverted cone column, and the diameter ratio of the bottom surface of the inverted cone column to the upper surface is 1: (1.1~1.25). The structure of the UASB reactor is as follows figure 1 Shown: The sludge reaction area is heated by a constant temperature water bath, with a two-layer structure inside and outside, the inner layer is the reaction area, and the outer layer is the constant temperature water bath area, and the reactor is protected from light;

[0028] (2) Use the mixture of landfill leachate and sewage plant anaerobic sludge as inoculation sludge to inoculate and acclimatize the UASB reactor, and add polymer flocculant PAM with a molecular weight of 4 to 8 million, in which the MLSS of the inoculation ...

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Abstract

The invention relates to a method for enhancing formation speed of anaerobic ammoxidation granular sludge by controlling reflux ratio. The method comprises the following steps: arranging a sludge reaction region of a UASB (upflow anaerobic sludge blanket) reactor tank body into an inverted cone cylinder; carrying out inoculation and domestication on the UASB reactor by using a refuse leachate-sewage plant anaerobic sludge mixture as inoculation sludge, and adding a high-polymer flocculant with the molecular weight of 4-8 million; adding a sewage plant sludge solution as an anaerobic ammoxidation granular sludge culture nutrient source; adding an inorganic mixed buffer solution to regulate the pH value to 7.85-8, and controlling the temperature of the tank body at 35+ / -1 DEG C; controlling the influent water nitrogen load at 0.4-0.5 kgN / m<3>.d, and enhancing the reflux ratio according to the 0%-50%-100%-150%-200% gradient; and while keeping the reflux ratio at 200%, enhancing influent water nitrogen load to 0.65-0.7 kgN / m<3>.d, and after the reactor reaches the stable state, forming the anaerobic ammoxidation granular sludge.

Description

technical field [0001] The invention relates to ANAMMOX sludge granulation technology, which belongs to the field of wastewater biological treatment, in particular to a method for controlling the reflux ratio to increase the formation speed of anaerobic ammonium oxidation granular sludge. Background technique [0002] ANAMMOX is a new technology for biological denitrification of wastewater with broad prospects. Compared with the traditional nitrification and denitrification process, its advantages are reflected in: first, no additional organic carbon source is needed for denitrification, and the sludge output is less; second, Oxygen is not needed at all, which saves a lot of operating costs; thirdly, no acid-base neutralizer is needed, which effectively avoids secondary pollution. In view of the above advantages, ANAMMOX technology has become a research hotspot of domestic and foreign scholars. Because anammox bacteria are sensitive to the environment, the operating conditi...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/34C02F9/14
CPCC02F1/66C02F3/307C02F3/34C02F9/00C02F2209/06C02F2209/14C02F2301/04C02F2301/10
Inventor 于鹏飞孙明唐欷晨苏杨周明俊傅金祥
Owner 江苏康玉环保科技有限公司
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